wnyc:  nationalgeographicdaily:  Empire State Building, New YorkPhoto: Joe McNally In the city that never sleeps a new awareness about energy means the  Empire State Building now uses bright lights at night only to celebrate  holidays and special events. And power-hungry Manhattan has generating  potential of its own: A tidal-energy project under development in the  swift-flowing East River could power a thousand homes.  Over at WNYC, we are in an Empire State of mind.
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